# Transmission Matrix(ABCD) MCQ’s

This set of RF & Microwave Circuit Design Multiple Choice Questions & Answers (MCQs) focuses on “Transmission Matrix(ABCD)”.

1. The voltage equation for a 2 port network that can be represented as a matrix is:
a) V1=AV2 + BI2
b) V1=CV2 + DI2
c) V1=BV2 +AI2
d) V1=DV2+CI2

2. ABCD matrix of the cascade connection of 2 networks is equal to:
a) Product of ABCD matrices representing the individual two ports
b) Sum of the ABCD matrices representing the individual two ports
c) Difference of the ABCD matrices representing the individual two ports
d) Sum of transpose of ABCD matrices representing the individual two ports

3. ABCD matrix is used:
a) When there is two or more port networks in the cascade
b) To represent a 2 port network
c) To represent a 2 port network
d) To represent the impedance of a microwave network

4. For simple impedance Z, the ABCD parameters are:
a) A=1, Z=B, C=0, D=1
b) A=0, B=1, C=1, D=0
c) A=Z, B=1, C=1, D=0
d) A=1, B=0, C=Z, D=1

5. C parameter for a transmission line of characteristic impedance Zₒ, phase constant β and length ‘l’ is:
a) j Yₒ Sin βl
b) j Zₒ Sin βl
c) j Zₒ tan βl
d) j Yₒ tan βl

6. For a 2 port network, if the admittance parameter Y₁₂=0.4, then B among the ABCD, parameters for the 2 port network is:
a) 2.5
b) 4.5
c) 5
d) 6

7. For a simple admittance Y, the ABCD parameters are:
a) A=1, B=0, C=Y, D=1
b) A=Z, B=1, C=1, D=0
c) A=1, B=0, C=Z, D=1
d) A=1, Y=B, C=0, D=1

8. For a 2 port network if Z₁₁=1.5 and Z₁₂=1.2, A parameter for the same 2 port network is:
a) 1.5
b) 1.25
c) 0.75
d) 1.75

9. If D=1.6 and B=2.8 for a 2 port network, then Y₁₁=?
a) 0.5714
b) 0.987
c) 0.786
d) 1.75

10. If A=2.8 and B=1.4 for a 2 port network then Z₁₁=?
a) 0.5
b) 2
c) 4.2
d) 2.7

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